The Housing Ombudsman will conduct a special investigation into complaint-handling at South London-based Wandle Housing Association due to concerns over its high maladministration rate.

The 7,000-home housing association’s maladministration rate is 89%, which the Ombudsman says is “comparatively high for the size of the landlord”.

The maladministration rate represents the percentage of complaints where the Housing Ombudsman finds a housing provider at fault for delaying or failing to take necessary action.